Thermally conductive sheet and production method for thermally conductive sheet
AssigneeSekisui Chemical Co., Ltd.
InventorsKeisuke Aramaki, Yuma Sato, Yusuke Kubo
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Abstract
A thermally conductive sheet includes: a binder resin; and a first thermally conductive filler oriented in a thickness direction of the thermally conductive sheet. The thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm2/W or less. The first thermally conductive filler is preferably a fibrous thermally conductive filler and/or a flaky thermally conductive filler. The thermally conductive sheet preferably further includes a second thermally conductive filler which is at least one selected from a group consisting of alumina, aluminum, zinc oxide, boron nitride, aluminum nitride, graphite, and a magnetic powder.
Claims16
A thermally conductive sheet, comprising:
- a binder resin;
- a first thermally conductive filler oriented in a thickness direction of the thermally conductive sheet at 60 to 120 degrees relative to a surface of the thermally conductive sheet;
- and
- a second thermally conductive filler, wherein
- the thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm2/W or less,
- the first thermally conductive filler is at least one selected from the group consisting of a fibrous thermally conductive filler and a flaky thermally conductive filler,
- the thermally conductive sheet comprises the fibrous thermally conductive filler in an amount of 10% by volume or less or comprises no fibrous thermally conductive filler, and
- the second thermally conductive filler is at least one selected from a group consisting of alumina, aluminum, zinc oxide, boron nitride, aluminum nitride, graphite, and a magnetic powder.
A production method for a thermally conductive sheet, comprising:
- dispersing a first thermally conductive filler and a second thermally conductive filler in a binder resin to prepare a resin composition for forming a thermally conductive sheet;
- forming a molded block from the resin composition;
- and
- slicing the molded block into a sheet to obtain the thermally conductive sheet;
- wherein
- the first thermally conductive filler is oriented in a thickness direction of the thermally conductive sheet at 60 to 120 degrees relative to a surface of the thermally conductive sheet and the thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm2/W or less,
- the first thermally conductive filler is at least one selected from the group consisting of a fibrous thermally conductive filler and a flaky thermally conductive filler,
- the thermally conductive sheet comprises the fibrous thermally conductive filler in an amount of 10% by volume or less or comprises no fibrous thermally conductive filler, and
- the second thermally conductive filler is at least one selected from a group consisting of alumina, aluminum, zinc oxide, boron nitride, aluminum nitride, graphite, and a magnetic powder.
Dependencies are inferred from the claim text.